Certain tracks may be edited within TIDAL, to edit a song on your iOS device select the menu button next to the the song title then click Track Edit. You can edit just a clip or the entire track, as well as speed up or slow down the tempo of the music. Click on Set Start, play the song, then click on Set End. Click Next and choose your tempo and fade options. Either hit Back to re-edit the song, or click on Save to an already existing playlist or a new one.
Please note: Not all tracks can be edited. This is not determined by TIDAL.